Tick resistance to acaricides in western Ethiopia.

A survey of acaricide resistance was performed on ticks collected from 18 dairy farms and 6 veterinary clinics in western Ethiopia. Boophilus decoloratus collected from most of the dairy farms were resistant to toxaphene, but no resistance was detected in ticks collected from indigenous cattle. There is a need in Ethiopia to replace toxaphene on dairy farms and formulate a rational tick control policy for the whole country.